We design and build custom homes in the Illawarra

Every house we build is a high quality original. There’s no template in the world that could meet the needs of every type of family, so we take the time to get to know the people we work for. Like the idea of having a custom house built for your family? We typically build homes in the range of $500,000 to $1.5mil. If you think we might be a great match, we’d love to hear about your vision for your family and your home in the beautiful Illawarra region of NSW.

Get started

Our process starts and finishes with you in the loop


Our designs start with you and your specific needs. We'll discuss who you are and how you want to live. You may come with a sketch on a napkin, a full drawing of a house, or simply a dream.

Your designer

You have a vision, and together we’ll create a custom design just for you. Importantly, your builder will be in the room to make sure every big idea works for the money you’d like to spend.

Your builder

The build team will fully understand your design and how it came to be, which means fewer surprises along the way. You’ll be welcome to be on-site and part of the build experience.

What our customers are saying

Ten stars to the crew of GN Williams! At all times a courteous, professional and dependable team. Great people with reliable contacts in the huge spectrum of trades necessary to build our dream home. I guess the most exacting test with regards to building is the question, "if you were to build again, would you choose the same company?". Our response re GN Williams, "in a heart beat".
Lea and Tony, Kiama

Planning to build near the coast?

We’ve been building in the Illawarra and South Coast since 1996, so we know a thing or two about building houses that suit the region.

Pop your details into our form and we’ll send you our checklist for building a home that will withstand coastal conditions and perfectly suit this beautiful part of the world.

We'll send you the checklist and other useful information you may like to consider in planning your new home. You can unsubscribe at any time.